tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: c2e7554e1b85935d962127efa3c2a76483b0b3b6 commit: 2ac6795fcc085e8d03649f1bbd0d70aaff612cad clocksource/drivers: Add CLINT timer driver date: 3 months ago config: riscv-randconfig-s032-20201118 (attached as .config) compiler: riscv32-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.3-107-gaf3512a6-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 2ac6795fcc085e8d03649f1bbd0d70aaff612cad # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=riscv If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; "sparse warnings: (new ones prefixed by >>)" drivers/clocksource/timer-clint.c:70:22: sparse: sparse: cast removes address space '__iomem' of expression drivers/clocksource/timer-clint.c:70:22: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __iomem *addr @@ got unsigned int [usertype] * @@ drivers/clocksource/timer-clint.c:70:22: sparse: expected void const volatile [noderef] __iomem *addr drivers/clocksource/timer-clint.c:70:22: sparse: got unsigned int [usertype] * drivers/clocksource/timer-clint.c:219:36: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void * @@ got struct clock_event_device [noderef] __percpu * @@ drivers/clocksource/timer-clint.c:219:36: sparse: expected void * drivers/clocksource/timer-clint.c:219:36: sparse: got struct clock_event_device [noderef] __percpu * vim +/__iomem +72 drivers/clocksource/timer-clint.c 58 59 #ifdef CONFIG_64BIT 60 static u64 notrace clint_get_cycles64(void) 61 { 62 return clint_get_cycles(); 63 } 64 #else /* CONFIG_64BIT */ 65 static u64 notrace clint_get_cycles64(void) 66 { 67 u32 hi, lo; 68 69 do { 70 hi = clint_get_cycles_hi(); 71 lo = clint_get_cycles(); 73 74 return ((u64)hi << 32) | lo; 75 } 76 #endif /* CONFIG_64BIT */ 77 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org